HRA
- British Horseracing Authority
- HRAS
- Hariah railway station
- Havering Residents Association
- Health Reimbursement Account
- Health Research Authority
- Health risk assessment
- Heidelberg Research Architecture
- Heritage Railway Association
- Herra
- High Redundancy Actuation
- Hindustan Republican Association
- Home runs allowed
- Honda Research America
- Hrangkhol language
- Human Rights Act (disambiguation)
- Human Rights Activists in Iran
- Human reliability analysis
- Human resource accounting
- New York City Human Resources Administration
- Piracy around the Horn of Africa
- Rockwell scale